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<?xml version="1.0" encoding="UTF-8" ?>
<class name="Crypto" inherits="Reference" category="Core" version="3.2">
<brief_description>
Access to advanced cryptographic functionalities.
</brief_description>
<description>
The Crypto class allows you to access some more advanced cryptographic functionalities in Godot.
For now, this includes generating cryptographically secure random bytes, and RSA keys and self-signed X509 certificates generation. More functionalities are planned for future releases.
[codeblock]
extends Node
var crypto = Crypto.new()
var key = CryptoKey.new()
var cert = X509Certificate.new()
func _ready():
# Generate new RSA key.
key = crypto.generate_rsa(4096)
# Generate new self-signed certificate with the given key.
cert = crypto.generate_self_signed_certificate(key, "CN=mydomain.com,O=My Game Company,C=IT")
# Save key and certificate in the user folder.
key.save("user://generated.key")
cert.save("user://generated.crt")
[/codeblock]
[b]Note:[/b] Not available in HTML5 exports.
</description>
<tutorials>
</tutorials>
<methods>
<method name="generate_random_bytes">
<return type="PoolByteArray">
</return>
<argument index="0" name="size" type="int">
</argument>
<description>
Generates a [PoolByteArray] of cryptographically secure random bytes with given [code]size[/code].
</description>
</method>
<method name="generate_rsa">
<return type="CryptoKey">
</return>
<argument index="0" name="size" type="int">
</argument>
<description>
Generates an RSA [CryptoKey] that can be used for creating self-signed certificates and passed to [method StreamPeerSSL.accept_stream].
</description>
</method>
<method name="generate_self_signed_certificate">
<return type="X509Certificate">
</return>
<argument index="0" name="key" type="CryptoKey">
</argument>
<argument index="1" name="issuer_name" type="String" default=""CN=myserver,O=myorganisation,C=IT"">
</argument>
<argument index="2" name="not_before" type="String" default=""20140101000000"">
</argument>
<argument index="3" name="not_after" type="String" default=""20340101000000"">
</argument>
<description>
Generates a self-signed [X509Certificate] from the given [CryptoKey] and [code]issuer_name[/code]. The certificate validity will be defined by [code]not_before[/code] and [code]not_after[/code] (first valid date and last valid date). The [code]issuer_name[/code] must contain at least "CN=" (common name, i.e. the domain name), "O=" (organization, i.e. your company name), "C=" (country, i.e. 2 lettered ISO-3166 code of the country the organization is based in).
A small example to generate an RSA key and a X509 self-signed certificate.
[codeblock]
var crypto = Crypto.new()
# Generate 4096 bits RSA key.
var key = crypto.generate_rsa(4096)
# Generate self-signed certificate using the given key.
var cert = crypto.generate_self_signed_certificate(key, "CN=example.com,O=A Game Company,C=IT")
[/codeblock]
</description>
</method>
</methods>
<constants>
</constants>
</class>
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